An approach to the interpersonal theory is made from different viewpoints as expressed in various contributions of certain sciences and philosophies. John Dewey, Ashley Montagu, Harry Stack Sullivan, and Gardner Murphy are among the sources used. The theories of contemporary science and philosophy have changed our concept of the world from a mechanistic-materialistic viewpoint which postulated isolated, self-contained immutable substances, to a concept of the world in terms of 'collective goings-on, interrelated processes or events'. Personality is a product of two dynamic and mutually interdependent processes of transmission, the one hereditary, the other sociocultural (operating by means of learning through symbolic communication). Dependency and interdependency is a basic characteristic of life and therefore coöperation is fundamental to